"[Jack's] doing really, really good and I want to thank everyone for all their texts and goodwill and love they send to us," Sharon said between sobs. "It's been amazing for Jack because I really believe that... prayer really helps."

The 59-year-old also revealed that son Jack will appear on the show on Wednesday (June 20) to discuss his diagnosis.

She added: "And what I'm doing right now is not helping because I'm just feeling sorry for myself, and that is no good."